Anson
Try this. I use it on my Corbin, have the same problem, not a wear spot, a large johnson.
DOC BAILEY'S LEATHER BLACK is as equally good on leather. It restores color, nourishes, waterproofs, and cleans. Excellent for ALL BLACK Smooth Leather, motorcycle clothing, jackets, chaps, gloves, boots leather furniture and Black Automotive Interiors. 118 mL / 4 oz. bottle with a separate sponge applicator.
If you want to try the Doc Baileys's, I have have some. I can bring it with me when I come out, if you aren't in a hurry.
RB